Molds & Tooling
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PMMA Flash
Problem Phenomenon
Flash on the parting line of PMMA products, leaving marks after trimming
Cause Analysis
Insufficient clamping or worn parting line; PMMA is very brittle and trimming easily chips and leaves marks; during on-site troubleshooting, verify item by item according to this mechanism, and avoid blindly adjusting the machine based only on experience
Solution
Calculate clamping force; match-grind the parting line; prioritize flash prevention, trim with special tools; after adjustment, take samples continuously to verify the effect, and resume mass production only after confirming stability; change only one variable at a time and record parameter changes to facilitate locating effective measures
Key Takeaway
PMMA flash requires prevention first, as trimming damage is large; after confirming effectiveness, solidify the parameters and practices into the work instruction to prevent recurrence; include this case in the defect archive as a reference for troubleshooting similar problems in the future
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